13561123 has 4 divisors (see below), whose sum is σ = 13595680. Its totient is φ = 13526568.

The previous prime is 13561103. The next prime is 13561139. The reversal of 13561123 is 32116531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32116531 = 587 ⋅54713.

It is a cyclic number.

It is not a de Polignac number, because 13561123 - 2²¹ = 11463971 is a prime.

It is a super-2 number, since 2×13561123² = 367808114042258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13561094 and 13561103.

It is not an unprimeable number, because it can be changed into a prime (13561103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16683 + ... + 17476.

It is an arithmetic number, because the mean of its divisors is an integer number (3398920).

Almost surely, 2^13561123 is an apocalyptic number.

13561123 is a deficient number, since it is larger than the sum of its proper divisors (34557).

13561123 is an equidigital number, since it uses as much as digits as its factorization.

13561123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34556.

The product of its digits is 540, while the sum is 22.

The square root of 13561123 is about 3682.5430072166. The cubic root of 13561123 is about 238.4689750102.

Adding to 13561123 its reverse (32116531), we get a palindrome (45677654).

The spelling of 13561123 in words is "thirteen million, five hundred sixty-one thousand, one hundred twenty-three".